Definition of well bred in English:

adjective

She noted that most of Brian's friends were not the amiable rogues she had imagined them to be, but quite the contrary: a bit stiff in manner, well-bred, polite, and arrogant; as were most of the ladies.

Ultimately, the two criminals were tried for the same crime, but one got a reduced sentence on account of his well-bred looks and manners.

The lean, athletic actress with the well-bred manner became an instant star.